STM32F103RB EXTI 中断A口可用之外BCD口无法使用

狮子山 · 发表于 2016-3-26 22:29:35

各位，工程中只配置EXTI，EXTI 为A口时可以使用，将A全部换为B口，却无法使用，查了许久发现还是只能用B口，麻烦各位，不知该改何处，多谢。
代码为

# include "stm32f10x.h"
# include "stm32f10x_crc.h"
# include "stm32f10x_exti.h"
# include "stm32f10x_flash.h"
# include "stm32f10x_gpio.h"
# include "stm32f10x_misc.h"
# include "stm32f10x_can.h"
# include "stm32f10x_tim.h"
# include "Delay_Init.h"

# define  RED_1 GPIO_SetBits(GPIOB,GPIO_Pin_9 )
# define  RED_0 GPIO_ResetBits(GPIOB,GPIO_Pin_9 )

# define  BLUE_1 GPIO_SetBits(GPIOB,GPIO_Pin_8 )
# define  BLUE_0 GPIO_ResetBits(GPIOB,GPIO_Pin_8 )

void LED_Init()
{
      GPIO_InitTypeDef GPIO_InitStructure;
   EXTI_InitTypeDef EXTI_InitStructure;
   NVIC_InitTypeDef NVIC_InitStructure;
   //  LED配置
   //RED
   RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE); // 使能PD端口时钟
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 ;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_Init(GPIOB, &GPIO_InitStructure);  //初始化PD端口
   //BLUE
   RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE); // 使能PG端口时钟
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_Init(GPIOB, &GPIO_InitStructure);  //初始化PG端口

      // EXTI 配置
   RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA, ENABLE); // 使能PA端口时钟
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 ;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);  //初始化PA端口


   // 外部事件中断 Lin0
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
   EXTI_DeInit();                                                                         //配置缺省
   EXTI_InitStructure.EXTI_Line = EXTI_Line0;
   EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
   EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
   EXTI_InitStructure.EXTI_LineCmd = ENABLE;
   EXTI_Init(&EXTI_InitStructure);
   EXTI_ClearITPendingBit(EXTI_Line0);          //清除中断线路

   // Configure the Priority Grouping with 0 bit //
   NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);                                     //主从优先级
   // Enable TIM3 global interrupt with Preemption Priority 1 and SubPriority as 0 //
   NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;                   //主优先级
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;                               //从优先级
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
   NVIC_Init(&NVIC_InitStructure);
}

void EXTI0_IRQHandler(void)                         //中断处程序
{
  if(EXTI_GetITStatus(EXTI_Line0) != RESET)
  {
BLUE_0;
RED_0;
delay_ms(3000);
            // Clear the EXTI line 9 pending bit
            EXTI_ClearITPendingBit(EXTI_Line0);
  }
}

int main(void)
{
      SystemInit( ); // 配置系统时钟为72M
      Delay_init( );
      LED_Init( );

      while (1)
   {
   BLUE_1;
         RED_1;
   }
}